Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/EE13996C-FF81-46C1-9213-F178993A3474 | ||
| Year | 2024 | ||
| Type of Item | Diploma Work | ||
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| Bibliographic Citation | Kallirroi Voulgari, "Simulation and experimental verification of induced voltages in a Medium Voltage network interconnecting a Wind Farm with an MV/HV substation", Diploma Work, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2024 https://doi.org/10.26233/heallink.tuc.101247 | ||
| Appears in Collections |
The increased demand from sustainable energy sources has led to the construction of wind farms in remote locations, where the weather conditions are ideal. To cope with the new challenges and the long distances, Medium Voltage (MV) transmission systems must be upgraded. Borrowing characteristics from high voltages cables, MV cables, use multiple layers of insulation, semiconductor and conductor materials, as well as advanced bonding methods to ground.The cross-bonding method has been newly implemented, introducing Sheath Voltage Limiters and link boxes in MV networks. To optimize system performance, the induced voltage on the exterior metallic sheath should be minimized, maintaining insulation integrity and lightning withstand capability.This thesis examines the study and field measurements of a MV transmission line at the Kafireas wind park in Evia. The objective is to address challenges related to safety and practical issues.A study will be presented, starting from the cable architecture to grounding methods and protection against overvoltage effects. Simulations with ATP/EMTP analyze the current and voltage on cable’s sheath.In practical implementation, tests were performed on Short-circuit type SVL series (Sheath Voltage Limiters), manufactured by Raycap. Field measurements of steady state current and voltage from sheath cables at Vios Windfarm (21.6 MW) on Mount Kafireas will also be presented. Accordingly, the simulated results as extracted from EMTP/ATP software were compared with the experimental results as acquired through the field measurements.
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